Electric engine order telegraph system



Ju 1947- c. J.- RASMUSSEN 2,422,701

ELECTRIC ENGINE ORDER TELEGRAPH SYSTEM Filed July 24, 1944 5 Shets-Sheet 1 V/swu 6/6/104- WITH BY ASTEZRN ENGINES AHEAD 1 i j w n L W fi L L V/sunL 676mm.

' L FINISHED STAND FULL HALF SLOW m STOP BY SLOW HALF FULL AsTERN ENGWES AHEAD Ire-y J/wra/A's My SWITCHES lfz Sn'lrcr/Es V INVENTOR.

CA/PL' J. EA5MU55EN BY June 24, 194

c. J. RASMUSSEN 2,422,701

ELECTRIC ENGINE ORDER TELEGRAPH SYSTEM Filed July 24, 1944 3 Sheets-Sheet 2 Il 13 7 /63 1/ 1/ L? y L? 1? WW WWMWW WWW] 4 '5) W'JWPJWFJWPJWMJWVJMWJWMMW INVENTOR. I CARL J. PAs/vlussEN June 24, 1947. Q J RASMUSSEN 2,422,701

ELECTRIC ENGINE ORDER TELEGRAPH SYSTEM 7 Filed July 24, 1944 3 Sheets-Sheet 3 INVENTOR. CA EL J. PAsMussE/v Patented June 24, 1947 oFFicE unscrew ENGINE ORDER. TELEGRAPH SYSTEM- Carl J. Rasmussen, Berkeley, Calif;

Applicationw July- 24, 1944', Serial N 0.. 5465.421;

5 Claims. C]. 17'73 34.)

(Grantedftmder. the act of March 3, 1883-, as:

amended April- 30, 1928.; 37:0 ()1 G. 757) l The invention described herein may be manufractured and used by offer-the Government of the United. States for governmental purposes without the payment to me-of any royalty thereon in. accordance with the. provisions. of the act of Aprilrdi), 1928:, (Ch; 460,- 45 Stat. L. 467).

This invention relates to signallingsystems and more particularly to electricalengine order telegraph systemslfor signalling from: a; selected point such as the pilot. house: of. a ship to: the: engine room of: that ship an for other similar purposes.

The principal obiect or the. invention is to provide a system for giving reliable, accurate and definite instructions to anengineer-or operator in a. ship's engine room. or the like, from a. position some distance therefrom, with, provision for the engineer or operator to repeat back the instructions in order to showthat they were properly received and carriedout.

Other and further objects of; the invention will appear more fully in the specification hereinafter following by reference to the accompanying drawingsin which."

Figure, 1- is' a front elevational view of the-transmitter instrumentpanel, which may for instance be located inthe wheel house, bridge-wings, after steering station, or any otherlocation fromwhich it. isre uired to give signal to the engine room or the like. This instrument v is known as-the engine order transmitter.

Figure 2v isasimilarview of the indicator instrument panel which may for instance be locatedin the engine room. at the engineers operating platform. This instrument is known as the engine. order indicator- Theseinstruments have the same. outside. appearance but differ as to. their function. which will be later shown.

Figure 3. isa. wiring. diagramofithe. engine order transmitter shown-in Figure 1.

Figure 4 is a wiring diagram of the engine order indicator shown in Figure 2.

The apparatus showniin ll'iguresa and 4-is connected together by multi-conducting cable.

Figure 5 is a detail endview of one of the indicating arrow mechanisms of the system. with certain parts removed; for clarity of illustration.

Figures 6" and 7 are detail front views of the indicating arrow mechanism with Figure 6 showin the indicating arrow in 011T position and Figure 7 showing the indicating arrow inon position; Certain of the. parts are shown broken away in Figure '7. to more clearly. show the associated parts thatlie beneath.

Figures 8 and 9 are detail endviews'partially in section of the mechani'smshown in Figures" 6 'tion such'as 3 and 4 in Figures 1 and 2'.

2 and 7 respectively with the indicating arrow mechanism removed to'more clearly show the association'o'f the indicator latching springs in their respective-off and on positions.

Referring to the drawings in more detail reference character I isthe case of the transmitter shown in Figure 1 and referencecharacter 2 is t'hecase-of'the'indicator shown in- Figure 2. The markings 3 on the transmitter panel are the required instructions to the engineer or operator and are also shown as 4 on the indicator panel Figure-[2i Switch 5 onthe transmitter, of'which there area number similar thereto, is used to give the signa1"stop to the engineer and, switch 6 on the indicator-is used by the engineer to reply tothe signal received on. the indicator from the transmitter to show that the signal stop has been received:. When. the switch 5; is pressed down and closed the transmitter indicatin arrow 1' comes, into View above that switch and points to the marking 3 which contains the instructions given to the engineer in they engine room and simultaneously on. the indicator in the engine room the indicating arrow 8 in'Figure 2 comes into view and points to the marking 4' which is the same as the corresponding marking, 3 on the transmitter panel, the engineer executes the order given and-replies by pressing down switch 6. Ind-i'cating arrow H3 in- Figure Zcomes into view and points to marking t on. the indicator and: simultaneouslythe indicating arrow 9'shown in Figure 1 comesinto viewand points to the marking 3 on the transmitter panel. The action of the engineer inreplying toinstructionsreceived on the. indicator is known by mariners as frepeat back. The same process is followed for any other order given from the transmitter panel" and acknowledged by theengineer from the engine room.

In order to more fully understand the operation of this invention it will be necessary to describe the component parts'of the transmitter and indicator and-follow the circuit diagrams in Figures'3and 4. Coils H and I2' and theirlike will be designated as on and on coils respectively and Will'- be further known as, a set of coils. A set ofcoils is required for each plate ofinstruc- One of. thesesets of coils and its associated indicating arrow mechanism, etc. is shown in detail in Figures 69- inclusive and more fullydescribed hereinaf'ter. Coil l2 and its like and coil I-4 and its like in Figures 3 and 4 are the on coils or the coils that bring indicating arrows 1" and 8 in Figures 1 and 2 or similar indicating arrows into view; Cell I! and its like and coil l5 and its like switch or its like is pressed down connection.

is first made with contact 5?) which energizes the on coil I2 or its like in the transmitter and on coil I4 or it like at the indicator, which moves indicating arrows I and 8 or their like into position to show the order given. These two coils are energized from the battery I3 or some other suitable source of electrical potential having one terminal thereof normally connected to one terminal of the on coils and by having switch 5 through switch arm 5a and contact 5b connect the other terminal of the battery I3 to the other terminals of the associated on coils I2 and I4 or the like.

In the above description the effect of the closure of switch arm 50. with contact 5b has been dealt with but when the switch lever 5 in Figure 1 is moved downwardly two thing-s occur, first a circuit is closed between 5a and 5b and then a circuit is closed between 5a and 50. When the switch arm 5a or its like makes connections with contact 5c all of the off coils II and I5 are energized from the battery I3 which moves all of the indicating arrows from view with the exception of the pair moved to the on position by the energization of on coils I2 and M which were energized via switch arm 5a and switch contact 5b prior to the time any off coils. were energized. When the switch arm 5ais returned to its original position due tospring action the off coil circuits are opened first at 50 and later the connection between 5b and 5a is broken leaving indicating arrows I and 8 in position as described more fully hereinafter. When another switch similar to 5 in the transmitter is pressed down the off coil I I and its like in Figure 3 in the transmitter and coil I5 and its like in Figure 4 in the indicator are energized which removes their respective indicating arrows from view. It will be noted that bells l5 and I! are connected in parallel with all of the off coils. These bells therefore ring when any oif coil is energized. When the engineer repeats back by pressing down switch 6 or its like the on coils for operating appropriate lower indicating arrows 9 and III are energized from the battery [3 via 6a and 61). Upon the further closure.

of switch 6 contact is made between 6a and 6c completinga circuit for ringing bells I6 and [1. These bells are audible signals for orders given and actedupon. 5

Character I8 in Figure 1 and character I9 in Figure 2 are green lenses covering lights 23 and 2I shown in Figures 3 and 4 respectively. The lights and 2| are circuit in order lights which will show illumination through the green lenses I8 and I9 when the circuit is energized from electrieal source I3. When the energizing circuit is out of order the circuit in order lights will cease illuminating the lenses. The set of coils II and I2 and their like have a mechanism which operates a lever when the on coil 12 is energized.

The lever has an indicating hand or arrow mounted on it. When the oil coil II is energ-ized and the on coil i2 is deenergized the lever with the indicating hand or arrowis drawn to its original positionout of sight. Switches 5 and 6 or their like are switches similar in outside appearance to the well-known toggle switch or its equivalent with the exception the switch handles are normally held in the upper or open position shown in Figures 1 and 2 by spring action. When the system is used aboard ship the switches should be of watertight construction,

Although it is contemplated that the mechanism for operating the indicating arrows 1-) or the like may take on a number of forms, a preferred construction is shown in Figures 5-9.

In these figures reference character 33 is an insulating support on which bracket members 3i preferably of magnetic material are fastened by screws 32. A member 29 preferably of nonmagnetic material is fastened to the bracket member 3| by screws 30 (Figure 5) with the member 29 supporting the plate 28 of non-magnetic material which is fastened to the member 29 by screws 5|,

' The bracket member 3| also carries soft iron cores 25 and 36 which are not shown in Figure 5 but are shown in Figures 7-9 inclusive. These cores are. fastened to the bracket member 3| by screws 50; The cores extendfrom the bracket member 3! throughclose fitting apertures provided in the plate 28 as shown in Figures 7-9. The cores thus help to support the plate 28. The cores are provided with coils of wire wound thereon. Coil I2 is mounted on core 35 and coil II is mounted on core 25. These coils correspond to the similarly numbered coils or their counterparts in Figures 3 and 4. Each of the coils is wound on a spool having insulating end pieces 46 and 48 as shown in Figures 3 and 9. The coil terminals are connected by wires 54 to binding posts 49, only one of the pair of which can be seen in Figures 8 and 9. The binding posts-49 extend through the insulating member 33 to an open space for connections. I

Two springs are mounted on plate 28, spring 31 is attached by means of screws 43 and 4| to have its free end overlie the core member 35. Spring 42 is similarly attached to have its free end overlie the core member 25. See Figures 6-9 inclusive. The springs 31 and 42 are offset where they pass over core members 36 and 25 respectively. These springs may be made of any good non-magnetic springmaterial such as Phosphor bronze or the like. The springs 31 and 42 are fitted at their offset portions with armatures 39 and 38 respectively of para-magnetic material so that with the magnetization of the respective cores by the energization of the coil thereon the springs will be pulled to the position of spring 31 in Figure 9.

Member 22 preferably of non-magnetic material is mounted on plate 28 by screw 24. The member 22 extends outwardly from the plate 28 and then parallel to'it. The portion of the member 22 extending parallel to the plate 28 is provided with two holes positioned opposite two like positioned holes in plate 28. These pairs of holes serve as bearings for the pins 53 and 55. The pin 53 is positioned at a point equidistant from the cores 25 and 36 and parallel thereto. The pin 53 pivotally carries a unitary structure consisting of armatures 23 and 34 andgear sector 35. The armatures 23 and 34 are associated with the magnetizable cores 35 and 25 respectively while the gear sector 35 meshes with a pinion 52 carried on pin 55. The member 21 is fixed to pin 55 and extends radially therefrom. An indicating arrow or hand similar to one of the arrows 1, 8, 9 and ID in Figures .1 and 2 is attached to member 2! to point in the appropriate direction,

In Figure .6 coil H on core 25 has been energized. magnetizing th'ecore, whereupon armature 33 was attracted to the core carrying along the outer end of the spring 42, thus unlatching the armature 34 which was in turn attracted tothe core 25, turning the gear sector 35 in a clockwise direction to drive pinion 52 counter-clockwise to withdraw the indicating arrow 9 out of view or to the off position.

In Figure 7 coil 12 on core 36 has been energized magnetizing the .core, whereupon armature 39 was attracted to the core carrying along the outer end of the spring 31 thus unlatching the armature 23 which was in turn attracted to the core 36 turning the gear sector 35 in a counterclockwise direction to drive pinion 52 clockwise to move the indicating arrow into view or to the on position.

While I have described my invention in certain preferred embodiments, I desire that it be un derstood that modifications may be made and that limitation upon my invention are intended other than are imposed by the scope of the appended claims.

I claim:

, 1. An electrical engine order telegraph system for transmitting instructions from a first point a to a second point and for transmitting repeat back signals to said first point from said second point indicating that said instructions were received and carried out comprising a panel at each of said points, said panels each being provided with a plurality of plates of instruction, a switch individual to each of said plates of instruction, a pair of indicating markers individual to each of said plates of instruction, said markers being normally retracted from view beneath said plates of instruction, 9, pair of coils individual to each of said indicating markers comprising an "on coil and an off coil, a source of potential common to all of said coils, means including the switch individual to one of said plates of instruction for completing a circuit from said source of potential to the on coils associated with similar plates of instruction on said two panels when said switch is initially closed, whereby the respective indicating markers associated with said coils are brought into view opposite corresponding plates of instruction on both of said panels, means including said switch individual to said plate of instruction when it is further depressed for energizing all of said off coils located at both of said panels whereby all of the indicating markers except the last one actuated are drawn to the off position, means for locking the last actuated indicating markers in on position until such time as the ofi coils of all of said indicating markers are energized upon the next operation of a difierent one of said switches.

2. A system as set forth in claim 1 including audible means for indicating when any one of said ofi coils are energized.

3. A system in accordance with claim 1 including signals on each of said panels for indicating when energy is available for operating said signals.

4. A system in accordance with claim 1 including repeat back mechanism whereby an operator at said second point may signal to said first point with signalling means similar to that used to signal from said first point to said second point as set forth in claim 1.

5. A signaling system for transmitting any selected one of a plurality of signals from a, first point to a second point comprisinga plurality of key switches at said first point corresponding to the respective ones of said signals tobe transmitted, a plurality of indicators at said second point corresponding to respective ones of said switches, means for setting a selected one of said indicators at said second point to indicating position responsive to the closure at said first point of the switch corresponding thereto, means for normally maintaining said indicator in indicating position after the opening of said switch, and

means for setting said indicator to non-indicating position responsive to the closure of another one of said switches in which each of said indicators includes an indicating hand, an off electromagnet and on electromagnet, and means for moving said indicating hand from off position to on position and vice versa responsive to the momentary energization of said on and off electromagnets respectively, said last mentioned means comprising a pivoted member adapted to be moved clockwiseand counterclockwise by magnetic attraction of respective ones of said electromagnets, and means for locking said pivoted member and said indicating hand in the position to which they are last set by one of said electromagnets until the other of said electromagnets is energized.

CARL J. RASMUSSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 860,001 White July 16, 1907 1,575,599 Hornberger Mar. 2, 1926 1,623,376 Auth Apr. 5, 1927 1,651,238 Wood Nov. 29, 1927 424,725 Porter Apr. 1, 1890 667,859 Wood Feb. 12, 1901 1,025,488 Street May 7, 1912 1,419,708 Wood June 13, 1922 FOREIGN PATENTS Number Country Date 108,213 Great Britain Aug. 2, 1917 Certificate of Correction Patent No. 2,422,701. June 24, 1947. CARL J. RASMUSSEN It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 5, line 19, before the word limitation insert no; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. I

Signed and sealed this 26th day of August, A. D. 1947.

[sEAL] LESLIE FRAZER,

First Assistant Oommissioner of Patents. 

